I have math equations on my RMarkdown document that I'm knitting to a PDF file using knitr. I'm using the Arial font, specified in my YAML as:
title: "My document"
subtitle: "Draft"
output:
pdf_document:
latex_engine: xelatex
mainfont: Arial
geometry: margin = 1in
fontsize: 11pt
The issue is that my equations use the default font instead of the one I set up in the YAML.
For example:
$$\mathrm{P}(Rain \mid Sun ) < \mathrm{P}(Rain \mid Cloud)$$
So I have two different fonts in my overall document, which is not what I want. How do I change the font for mathematical expressions in RMarkdown?
I'm not all that savvy on latex. However, when I used mathfont: Arial
it was ignored. (I tried using it with both xelatex
and lualatex
.)
I was able to get it to work, but some of the content was smashed together. This works so that it's readable, still math, and arial font.
---
title: "Untitled"
author: "me"
date: "2/19/2022"
output:
pdf_document:
latex_engine: lualatex
header-includes:
- \usepackage{amsmath}
- \usepackage{unicode-math}
- \usepackage{babel}
- \defaultfontfeatures{ Scale=MatchLowercase, Ligatures = TeX }
- \setmainfont{Arial}
- \setsansfont{Arial}
- \setmonofont{Andale Mono}
- \setmathfont{GFSNeohellenicMath.otf}
- \setmathfont[range=up]{Arial}
- \setmathfont[range=it]{Arial Italic}
- \setmathfont[range=bfup]{Arial Bold}
- \setmathfont[range=bfit]{Arial Bold Italic}
- \setmathfont[range=tt]{Andale Mono}
---
Here's some of the math I used to validate this:
$$A_{m,n} =
\begin{pmatrix}
a_{1,1} & a_{1,2} & \cdots & a_{1,n} \\
a_{2,1} & a_{2,2} & \cdots & a_{2,n} \\
\vdots & \vdots & \ddots & \vdots \\
a_{m,1} & a_{m,2} & \cdots & a_{m,n}
\end{pmatrix}$$
$$f(data | \lambda) \pi ( \lambda)$$
$$ answer ~=~ \frac{\pi}{d}$$
The output:
With only mathfont: Arial
in the YAML, regardless of the engine:
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